为了保证数据传输过程中的安全,加密使用对称加密算法AES 128位加密,加密模式采用CBC,填充模式采用PKCS5Padding方式,字符编码uft-8。
package cn.eakay.tbox.charge.util.crypto; import sun.misc.BASE64Decoder; import sun.misc.BASE64Encoder; import javax.crypto.Cipher; import javax.crypto.spec.IvParameterSpec; import javax.crypto.spec.SecretKeySpec; /** * @Title: AESUtil * @Description: 数据加密 对称加密算法AES 128位加密,加密模式采用CBC,填充模式采用PKCS5Padding方式 * @author chy * @date 2018/6/11 15:33 */ public class AESUtil { /** * 加密字符串 * @param sSrc 源字符串 * @param sKey 加密key * @param ivParameter 向量 * @return * @throws Exception */ public static String Encrypt(String sSrc, String sKey, String ivParameter) throws Exception { if (sKey == null) { System.out.print("Key为空null"); return null; } // 判断Key是否为16位 if (sKey.length() != 16) { System.out.print("Key长度不是16位"); return null; } byte[] raw = sKey.getBytes(); SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES"); //"算法/模式/补码方式" Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding"); //使用CBC模式,需要一个向量iv,可增加加密算法的强度 IvParameterSpec iv = new IvParameterSpec(ivParameter.getBytes()); cipher.init(Cipher.ENCRYPT_MODE, skeySpec, iv); byte[] encrypted = cipher.doFinal(sSrc.getBytes("utf-8")); //此处使用BASE64做转码功能,同时能起到2次加密的作用。 //过滤\r\n换行符 return new BASE64Encoder().encode(encrypted).replaceAll("\\r\\n",""); } /** * 解密 * @param sSrc 加密字符串 * @param sKey 密码key * @param ivParameter 向量 * @return * @throws Exception */ public static String Decrypt(String sSrc, String sKey, String ivParameter) throws Exception { try { // 判断Key是否正确 if (sKey == null) { System.out.print("Key为空null"); return null; } // 判断Key是否为16位 if (sKey.length() != 16) { System.out.print("Key长度不是16位"); return null; } byte[] raw = sKey.getBytes("ASCII"); SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES"); Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding"); IvParameterSpec iv = new IvParameterSpec(ivParameter.getBytes()); cipher.init(Cipher.DECRYPT_MODE, skeySpec, iv); byte[] encrypted1 = new BASE64Decoder().decodeBuffer(sSrc);//先用base64解密 try { byte[] original = cipher.doFinal(encrypted1); String originalString = new String(original,"utf-8"); return originalString; } catch (Exception e) { System.out.println(e.toString()); return null; } } catch (Exception ex) { System.out.println(ex.toString()); return null; } } /** * 测试代码 * @param args * @throws Exception */ public static void main(String[] args) throws Exception { String src="{\"FailReason\":\"无\",\"OperatorID\":\"123456789\",\"SuccStat\":1,\"AccessToken\":\"0F495FD8CFC664FE862C1B148FB4383D\",\"TokenAvailableTime\":36288000}"; String str = AESUtil.Encrypt(src, "1234567890abcdef", "1234567890abcdef"); System.out.println(src); System.out.println("Base64加密后字符串:"+str); String des64="M4doTaek+oiC3aig1avQhwCuieD0w9kV1RhoxX2jF44YKnvF39FHJoeVr7yoUiM8mDAvIzfcoX8ejMM0pyg9pBr2YOPeCdg/3nw74VL3fOZjgKOi9ywVwP7hkhFnA8Vk26nBLY0xzot4CySbG252B9sWpcer6TQPNl6O80IefCXRa/Gjb0z9IEcAHPR/+FKm"; str=AESUtil.Decrypt(des64, "1234567890abcdef", "1234567890abcdef"); System.out.println("解密字符串:"+str); } }
